Description: Jurassic Jewellery A unique range of fossil and meteorite specimens - as well as a wide range of genuine fossil and meteorite jewellery A HUGE Range of genuine fossil and meteorite specimens. I have supplied fossils and meteorites to many world famous museums and galleries, including the Natural History Museum in London and the San Diego Air And Space Museum , California USA I have even supplied fossils for use on TV programmes and theatre shows. I have been asked to supply fossils that have been seen on screen in a Channel 4 Television show, and also a touring theatre production. ------------------------------------------- Iceland Spar Crystal 'Optical Calcite' Mexico Iceland Spar is an intriguing form of Calcite. The crystals have formed into a beautiful double refractive shape. This can be demonstrated by holding a crystal over some printed words The letters you look at will be doubled and appear I have shown this effect in one of the images on the listing. A ray of unpolarized light passing through the crystal divides into two rays of perpendicular polarization directed at different angles, called double refraction. So objects seen through the crystal appear doubled. Historically, the double-refraction property of this crystal was important to understanding the nature of light as a wave. This was studied at length by Christiaan Huygensand Isaac Newton. Sir George Stokes also studied the phenomenon. Its complete explanation in terms of light polarization was published by Augustin-Jean Fresnel in the 1820s. The crystal has three sets of cleavages - parallel planes of weakness - along which the stone will fracture under pressure. You will receive ONE of the crystals in the image - picked at random from my stocks They all vary a LITTLE in size and proportions but are all pretty similar They all measure roughly 5cm across at their widest point. They all weigh approximately 100 Grams powered by plentymarkets
Price: 10 GBP
Location: Manchester
End Time: 2024-11-09T16:14:35.000Z
Shipping Cost: 12.96 GBP
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Item Specifics
Return postage will be paid by: Seller
Returns Accepted: Returns Accepted
After receiving the item, your buyer should cancel the purchase within: 60 days
EAN: 0033383011001
Toys_Brand: Jurassic Jewellery
